GB482219A - Manufacture of polyvinyl acetals - Google Patents
Manufacture of polyvinyl acetalsInfo
- Publication number
- GB482219A GB482219A GB26770/36A GB2677036A GB482219A GB 482219 A GB482219 A GB 482219A GB 26770/36 A GB26770/36 A GB 26770/36A GB 2677036 A GB2677036 A GB 2677036A GB 482219 A GB482219 A GB 482219A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyvinyl
- alcohol
- acid
- acetaldehyde
- octyraldehyde
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/28—Condensation with aldehydes or ketones
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Polyvinyl acetals are manufactured by acting on an aqueous emulsion of a polyvinyl ester containing a polyvinyl alcohol or a water-soluble derivative thereof as emulsifying agent, in the presence of a mineral acid or a strong organic acid, with a quantity of a carbonyl compound sufficient to convert at least part of the polyvinyl ester to a polyvinyl acetal. Specified materials are: water-soluble derivatives of polyvinyl alcohol-polyvinyl alcohols partly esterified with an organic acid, e.g. acetic, propionic, or butyric acid, or partly acetalized with an aldehyde, e.g. formaldehyde, acetaldehyde, butyraldehyde, octyraldehyde, or. benzaldehyde; polyvinyl esters-the formate, acetate, propionate, and butyrate; acid catalysts-mineral acids, e.g. sulphuric, hydrochloric, nitric, phosphoric, hydrofluoboric acids, and strong sulphonic acids, e.g. toluene sulphonic acids; carbonyl compounds-formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, octyraldehyde, benzaldehyde, cyclohexanone and methylcyclohexanone. There may also be present an alcohol, e.g. methyl, ethyl or propyl alcohol. In examples (1), (2), (4), an emulsion of polyvinyl acetate in aqueous polyvinyl alcohol is acetalized by acetaldehyde in the presence of methyl alcohol and sulphuric acid, by butyraldehyde in the presence of ethyl alcohol and p-toluene sulphonic acid, or by octyraldehyde in the presence of ethyl alcohol and phosphoric acid; (3) an emulsion of polyvinyl butyrate in aqueous-alcoholic polyvinyl alcohol is acetalized by acetaldehyde in the presence of methyl alcohol and hydrochloric acid. The product of example 2 may be worked up as threads. Specifications 466,173 and 469,319 are referred to.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI55998D DE731684C (en) | 1936-09-24 | 1936-09-24 | Process for the preparation of polyvinyl acetals |
GB26770/36A GB482219A (en) | 1936-09-24 | 1936-10-02 | Manufacture of polyvinyl acetals |
FR827054D FR827054A (en) | 1936-09-24 | 1937-09-23 | Process for the preparation of polymerization products |
US164756A US2158311A (en) | 1936-09-24 | 1937-09-29 | Process of preparing polymeric products |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI55998D DE731684C (en) | 1936-09-24 | 1936-09-24 | Process for the preparation of polyvinyl acetals |
GB26770/36A GB482219A (en) | 1936-09-24 | 1936-10-02 | Manufacture of polyvinyl acetals |
Publications (1)
Publication Number | Publication Date |
---|---|
GB482219A true GB482219A (en) | 1938-03-25 |
Family
ID=25981958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26770/36A Expired GB482219A (en) | 1936-09-24 | 1936-10-02 | Manufacture of polyvinyl acetals |
Country Status (4)
Country | Link |
---|---|
US (1) | US2158311A (en) |
DE (1) | DE731684C (en) |
FR (1) | FR827054A (en) |
GB (1) | GB482219A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2434313A (en) * | 1943-05-25 | 1948-01-13 | Bonard Claude | Manufacture of compounds containing carbonyl groups |
US4385155A (en) * | 1981-12-02 | 1983-05-24 | W. R. Grace & Co. | Method of preparing crosslinked poly(vinyl alcohol) |
-
1936
- 1936-09-24 DE DEI55998D patent/DE731684C/en not_active Expired
- 1936-10-02 GB GB26770/36A patent/GB482219A/en not_active Expired
-
1937
- 1937-09-23 FR FR827054D patent/FR827054A/en not_active Expired
- 1937-09-29 US US164756A patent/US2158311A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR827054A (en) | 1938-04-15 |
US2158311A (en) | 1939-05-16 |
DE731684C (en) | 1943-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB554268A (en) | Improvements in sizing | |
GB482219A (en) | Manufacture of polyvinyl acetals | |
GB497146A (en) | Polyvinyl acetal resins | |
GB577761A (en) | New and improved plasticised compositions comprising polyvinyl alcohol | |
GB479548A (en) | Process for making polyvinyl acetal resins | |
GB510168A (en) | Manufacture of polymeric compounds | |
GB629631A (en) | Improvements in or relating to colour photography | |
GB477885A (en) | Improvements in vinyl resins | |
FR1220859A (en) | Process for the preparation of polyvinyl acetal dispersions | |
GB558955A (en) | Improvements relating to the art of uniting surfaces of wood or like materials and to compositions suitable for use therein | |
GB499184A (en) | Polyvinyl acetal resins | |
GB557159A (en) | Improvements in synthetic resins | |
GB785164A (en) | Manufacture of polyvinyl acetal sulpho-acids | |
GB606962A (en) | Improvements in or relating to the preparation of substituted cyanoacetic esters | |
GB542595A (en) | Polyvinyl acetal resins | |
GB1476226A (en) | Method of rearranging tertiary vinyl carbinols | |
GB637737A (en) | Improvements in/or relating to a process for preparing a polyvinyl acetal resin and the polyvinyl acetal resin resulting from the said process | |
GB991941A (en) | Pharmaceutical coating composition and process for preparing the same | |
GB935006A (en) | Improvements in or relating to isoprene derivatives of trimethyl cyclohexene | |
GB823260A (en) | Polyvinyl acetals | |
US2249545A (en) | Polyvinyl acetal resin sheets containing a mixture of dibutyl sulphone and dibutyl phthalate | |
GB513119A (en) | Improvements in or relating to the manufacture of polyvinyl acetal resins | |
GB789693A (en) | Unsaturated aldehydes, acetals and ether acetals and a process for the manufacture thereof | |
GB499343A (en) | Improvements in or relating to the electro deposition of metals | |
GB338002A (en) | The manufacture and use of new synthetic resins |